Yes, when you change the name of something in GA4 (Google Analytics 4), you will not lose any existing data or historical events associated with the old name. All the data previously collected under the old name will remain in your system and will still be accessible. Changing the name only affects how the data is labeled moving forward; it does not change or erase previously labeled data. Remember however that your new data and reports will start using the new applied name. Hence, you may need to adjust or realign your previous data analyses or annotations to match the new name for consistency.